Insert-connecting toy
CA 2022908 A1 · Owner: Huan, Fan L. · Inventors: Ning, Sun Y.; Huan, Fan L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A insert-connecting toy which is insert-connected by several irregular construction units, in which the, construction units are divided into meta-elements and sub-elements; the thickness of the thinnest sub-element is taken as a unit thickness, and the thicknesses of the other sub-elements are an integer number times the unit thickness; several grooves are arranged on the metaelement, and the width of the grooves and the width of the laminate convex bank formed by the grooves are all an integer number times the unit thickness; and several grooves are also arranged on at least one of the subelements, and the width of the grooves and the width of the laminate convex bank formed by the grooves …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed August 8, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.